with the size of the explosion the videos show, i feel like the backpacks shown in the pics would've been destroyed worse than what is showed. i don't see any signs of it even looking too burnt or charred. just my opinion tho...has it been confirmed by officials that these bags were the origins of the bombs?

A suspect would fit the profile is interesting. I mean I've said from the beginning as many people have, young white homegrown terror most likely with a military background, not hard to use a standard profile.